Development of a model to select plants with optimum metal phytoextraction potential

Guala, Sebastián; Vega, F.A.; Covelo, Emma F.

doi:10.1007/s11356-011-0456-x

Cited by 15 publications

(5 citation statements)

References 31 publications

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“…In addition, Guala et al (2010a, b) adapted the mathematical equations to involve different plants and different metals in the model. The relationship between the metal in the soil and the total content of the metal in plants is highlighted by Guala et al (2011). Additional modifications to the abovementioned models have been performed by Guala et al (2013) and involve changes in the concentrations of metals in the biomass and the accumulation curves of metals in plants as a function of pH.…”

Section: Effects Of Metal Uptake On Plant Growthmentioning

confidence: 99%

Phytoextraction of Metals: Modeling Root Metal Uptake and Associated Processes

et al. 2014

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IntroductionPhytoextraction is a process which can remove the soluble (bioavailable) metal pool from soil or aqueous solutions using different kinds of terrestrial or aquatic plants. This transport may be divided into three different steps: (1) absorption from the solution (e.g., soil solution), (2) transport to the root xylem, and (3) transport to the shoots (Mench et al. 2009).A modern approach, how to evaluate the extraction potential of selected plants as well as how to plan and design the most effective metal phytoextraction, is the ability to relevantly model this process. There are many studies aimed at the modeling of metal transport. Nevertheless, there is a limited amount of present studies, which are focused on the modeling of the phytoremediation process. In general, developing an applicable model requires sufficient conceptual model description and a fundamental theoretical understanding of the studied system, as well as its experimental equipment and measurement; these are all crucial aspects required to create a relevant simulation of studied problem. This chapter attempts to describe the problems associated with metal phytoextraction modeling. The term "root metal uptake" is crucial for the simulation of phytoremediation of metals, which is a concrete modification of the general term "root uptake." Root uptake is one of the most important processes considered in numerical models because root surfaces represent the first-phase boundaries in nature for nutrients and toxic elements. In order to efficiently model the phytoextraction processes, it is essential to provide information about (1) the spatiotemporal concentration changes of metals in the root-influenced soil and (2) the cumulative uptake of metals per unit length of root over time (Darrah et al. 2006). Root UptakeDetermining water and metal uptake by plant roots and their subsequent translocation into the tissues of the aerial parts is obviously critical for assessing the modeling of phytoremediation options. Because metals are taken up by plants dissolved in water, it is crucial to have information about the transport of water and the hydraulic properties of the roots. Root Water UptakeWater is primarily absorbed by the root hairs and other root zones and then transported to the aerial parts in xylem tissues. Water absorption by the plants is mainly a response to the water potential gradient (from low to high energy) from the rhizosphere to the xylem of the roots. Soil water has a lower total solute concentration than plant water, and hence the osmotic gradient tends to drive water from the soil into the root. The rate of water uptake from the soil depends on rooting density, the hydraulic conductivity of the roots, and the difference between average soil-water suction and root suction. The root hydraulic conductivity is a measure of the amount of water transported by the root in an interval of time at a determinate pressure [mg g et al. 1987). It depends on osmotic potential gradients which result from differences in the composition and t...

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Section: Effects Of Metal Uptake On Plant Growthmentioning

confidence: 99%

Phytoextraction of Metals: Modeling Root Metal Uptake and Associated Processes

et al. 2014

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“…Excess of one element with respect to another element usually is the cause of the physiological response of the plant (Benzarti et al 2008;Guala et al 2011). The mutual macroelements ratio in soil has a significant role in plant growth, as presented by Haynes (1990) with regard to the significant inhibition of calcium uptake in case of higher concentrations of Mg 2?…”

Section: Introductionmentioning

confidence: 99%

Copper phytoextraction with willow (Salix viminalis L.) under various Ca/Mg ratios. Part 1. Copper accumulation and plant morphology changes

et al. 2013

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This work reports a part of hydroponic experiment results concerning changes in Salix viminalis L. cv. 'Cannabina' morphology and physiology under stress conditions with different copper concentration levels and verifies our earlier results about the role of different Ca/Mg ratios in trace elements' accumulation efficiency. In this part, we present the copper accumulation and changes in willow biomass. Concentration of copper in roots, rods, shoots and leaves was analyzed with flame atomic absorption spectrometry. Selected indices characterizing copper accumulation and plant biomass structure were calculated to estimate the potential of willow to remove metal from polluted solution. Our results indicate a general increase of copper accumulation by selected willow organs with increase of copper concentration in modified Knop's medium. Moreover, significant differences in copper phytoextraction between plants under different Ca/Mg ratios were affirmed (1:10 [ 4:1 [ 20:1 [ 1: 1 / 4 ).

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“…Australian trees use bioaccumulation and bio-restriction to limit the uptake of metals and to ensure optimal growth and survival. Eucalypt species can store high levels of metals and are known as hyperaccumulators (Guala, et. al., 2011).…”

Section: Literature Reviewmentioning

confidence: 99%

Public Health Implications of metals concentrations from prescribed burns: A study adjacent to the Perth Metropolitan Area.

Edwards¹

2019

JNHC

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Ash is not a homogenous product. It is the solid residue of combustion and contains a complex mixture of chemical products. The ash residue resulting from fires varies and is dependent on its source, and burn characteristics such as the temperature of the fire. Ash comprises particles of carbon, soot and trace elements. Ash presents public health risk to people and communities, through direct and indirect ingestion and inhalation. The health effects of ash exposure are not limited to symptoms affecting the eyes, throat and lungs. They can contribute to chronic disease and increase the risk of cancer.The purpose of this study was to evaluate the public health implications of controlled burns in the Darling Escarpment, adjacent to Perth's metropolitan area in Western Australia. Concentrations of metals in unburnt vegetative litter and ash (post burn), stratified by size fraction, were determined to assess the potential mobilisation of metals caused by prescribed burns and the potential public health implications associated with burns. These data can also be used in predictive modelling to ascertain the amount of metals likely to be released per hectare when authorities plan future burns in the area. Ash samples were collected immediately following the fire to capture fine material before it was blown away. The ash samples were separated into size fractions to investigate whether there are differences within each sub sample. Australia's National Environmental Protection Measures were used to establish whether the metal concentrations were above designated thresholds for health and environmental investigation, these being the recognised levels above which metals are deemed to pose a risk to public (or environmental) health.Vegetation and ash samples were collected from three sites immediately after the prescribed burn. Samples were analysed for thirteen (13) metals with nine (9) showing statistically significant increases in concentrations in vegetation as compared to ash. The percentages of metals are higher in ash than in vegetative ground litter.

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Development of a model to select plants with optimum metal phytoextraction potential

Cited by 15 publications

References 31 publications

Phytoextraction of Metals: Modeling Root Metal Uptake and Associated Processes

Phytoextraction of Metals: Modeling Root Metal Uptake and Associated Processes

Copper phytoextraction with willow (Salix viminalis L.) under various Ca/Mg ratios. Part 1. Copper accumulation and plant morphology changes

Public Health Implications of metals concentrations from prescribed burns: A study adjacent to the Perth Metropolitan Area.

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